Accelerators have produced high-energy particle beams
with sizes as small as 70 nm and with 500 nm beams in stable collision.
These "nanobeams" impose stringent tolerances on the magnetic
focusing and the stability of the accelerator. Future linear colliders
foresee colliding high-energy particle beams with vertical spot sizes
down to the 1 nm level. The feasibility and limits of generation,
control, and collision of nanometre-size beams is discussed, including
the relevant experience in different areas of research. The workshop should inspire a lively exchange of
advanced ideas and concepts between the involved scientists and
engineers. Details.